Hurd compat fixes. Mostly dealing with absent PATH_MAX

Signed-off-by: Jérémie Koenig <jk@jk.fr.eu.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 14 insertions, 12 deletions

diff --git a/scripts/basic/docproc.c b/scripts/basic/docproc.c
index dc7a0fcd2..ef5181226 100644
--- a/scripts/basic/docproc.c
+++ b/scripts/basic/docproc.c
@@ -79,7 +79,9 @@ void exec_kernel_doc(char **svec)
 {
         pid_t pid;
         int ret;
-        char real_filename[PATH_MAX + 1];
+        char *real_filename;
+        int rflen;
+
         /* Make sure output generated so far are flushed */
         fflush(stdout);
         switch(pid=fork()) {
@@ -87,10 +89,11 @@ void exec_kernel_doc(char **svec)
                         perror("fork");
                         exit(1);
                 case  0:
-                        memset(real_filename, 0, sizeof(real_filename));
-                        strncat(real_filename, getenv("SRCTREE"), PATH_MAX);
-                        strncat(real_filename, KERNELDOCPATH KERNELDOC,
-                                        PATH_MAX - strlen(real_filename));
+                        rflen  = strlen(getenv("SRCTREE"));
+                        rflen += strlen(KERNELDOCPATH KERNELDOC);
+                        real_filename = alloca(rflen + 1);
+                        strcpy(real_filename, getenv("SRCTREE"));
+                        strcat(real_filename, KERNELDOCPATH KERNELDOC);
                         execvp(real_filename, svec);
                         fprintf(stderr, "exec ");
                         perror(real_filename);
@@ -166,11 +169,10 @@ void find_export_symbols(char * filename)
         struct symfile *sym;
         char line[MAXLINESZ];
         if (filename_exist(filename) == NULL) {
-                char real_filename[PATH_MAX + 1];
-                memset(real_filename, 0, sizeof(real_filename));
-                strncat(real_filename, getenv("SRCTREE"), PATH_MAX);
-                strncat(real_filename, filename,
-                                PATH_MAX - strlen(real_filename));
+                int rflen = strlen(getenv("SRCTREE")) + strlen(filename);
+                char *real_filename = alloca(rflen + 1);
+                strcpy(real_filename, getenv("SRCTREE"));
+                strcat(real_filename, filename);
                 sym = add_new_file(filename);
                 fp = fopen(real_filename, "r");
                 if (fp == NULL)
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 6d61044c4..bbb575cec 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -203,7 +203,7 @@ void clear_config(void)
  */
 void use_config(char *m, int slen)
 {
-        char s[PATH_MAX];
+        char *s = alloca(slen+1);
         char *p;
 
         if (is_defined_config(m, slen))
@@ -310,7 +310,7 @@ void parse_dep_file(void *map, size_t len)
         char *m = map;
         char *end = m + len;
         char *p;
-        char s[PATH_MAX];
+        char *s = alloca(len);
 
         p = memchr(m, ':', len);
         if (!p) {